L.A. Winners

I read L.A. Winners.

Before I read this book, I thought this story is Jockey's story. A man who was winner of horse race past joins race again. He get a good horse but someone is going to preventing him to win race.
Although he won the race finally.

After I read this book, I found my prediction was wrong. This story is for detective man. He was hired a woman. Her request was looking for her horse. He looked for it in a racetrack.

I have a interrogations for this story. He was laid off her but he help her from criminal. Why did he help her? Did he get the payment?